Apparatus and method for allocating resources in wireless communication system

Abstract

A pre-5th-Generation (5G) or 5G communication system is provided for supporting higher data rates than in 4th-Generation system. An apparatus of a base station includes: at least one transceiver and at least one processor operatively connected to the transceiver. The transceiver receives channel quality information from a terminal. The processor obtains a first modulation and coding scheme (MCS) level and a number of first resource blocks based on the channel quality information, determines a power boosting value for applying a second MCS level indicating a higher modulation order or a higher code rate than the first MCS level, obtains, based on the power boosting value, a number of second resource blocks corresponding to a transport block size (TBS) value greater than a TBS value corresponding to the number of the first resource blocks in the first MCS level and transmits downlink data based on these determinations.

What is claimed is: 
     
       1. A method of operating a base station in a wireless communication system, the method comprising:
 receiving, from a terminal, channel quality information; 
 obtaining a first modulation and coding scheme (MCS) level and a number of first resource blocks based on the received channel quality information; 
 obtaining a number of second resource blocks based on a power boosting for a target channel quality of a second MCS level, wherein the second MCS level indicates at least one of a higher modulation order or a higher code rate than the first MCS level; 
 transmitting, to the terminal, downlink data based on the second MCS level and the number of the second resource blocks, wherein a second transport block size (TBS) value corresponding to the number of the second resource blocks in the second MCS level is greater than a first TBS value corresponding to the number of the first resource blocks in the first MCS level. 
 
     
     
       2. The method of  claim 1 , further comprising:
 determining whether or not to activate a power boosting mode in which the power boosting is performed for scheduling to apply the second MCS level different from the first MCS level that corresponds to the channel quality information. 
 
     
     
       3. The method of  claim 2 , further comprising transmitting downlink data to the terminal on based on the first MCS level and the first resource blocks in response to the determining not to activate the power boosting mode. 
     
     
       4. The method of  claim 2 , wherein the determining whether or not to activate the power boosting mode further comprises determining whether or not to activate the power boosting mode based on at least one of:
 whether or not the first MCS level is equal to or less than an threshold MCS level value, or 
 whether or not the number of the first resource blocks is equal to or more than a threshold resource block value. 
 
     
     
       5. The method of  claim 2 , wherein the determining of whether or not to activate the power boosting mode further comprises determining whether or not to activate the power boosting mode based on whether a type of the downlink data is an enhanced mobile broadband (eMBB) or ultra-reliable and low-latency communications (URLLC). 
     
     
       6. The method of  claim 1 , wherein the obtaining of the number of the second resource blocks further comprises:
 identifying a candidate for the number of the second resource blocks based on the number of the first resource blocks and a value of the power boosting; and 
 obtaining the candidate as the number of the second resource blocks in response to identifying that the second TBS value corresponding to the candidate is greater than the first TBS value, and 
 wherein the candidate provides a largest TBS within a range of resource blocks identified based on the number of the first resource blocks and the value of the power boosting. 
 
     
     
       7. The method of  claim 1 , further comprising:
 when it is not possible to obtain the number of the second resource blocks in which the second TBS value is greater than the first TBS value, transmitting downlink data to the terminal based on the first MCS level and the number of the first resource blocks. 
 
     
     
       8. The method of  claim 1 , wherein the channel quality information comprises at least one of a channel quality indicator (CQI) which is a measurement result of a signal transmitted from the base station or hybrid automatic repeat request (HARQ)-acknowledge (ACK) information for a downlink signal transmitted from the base station. 
     
     
       9. The method of  claim 1 , wherein a value of the power boosting is obtained based on a difference between a channel quality of the received channel quality information and to the target channel quality of the second MCS level. 
     
     
       10. An apparatus of a base station in a wireless communication system, the apparatus comprising:
 at least one transceiver; and 
 at least one processor operatively connected to the at least one transceiver, 
 wherein the at least one processor is configured to:
 control the at least one transceiver to receive, from a terminal, channel quality information; 
 obtain a first modulation and coding scheme (MCS) level and a number of first resource blocks based on the channel quality information; 
 obtain a number of second resource blocks based on a power boosting for a target channel quality of a second MCS level, wherein the second MCS level indicates at least one of a higher modulation order or a higher code rate than the first MCS level; and 
 control the at least one transceiver to transmit, to the terminal, downlink data based on the second MCS level and the number of the second resource blocks, 
 
 wherein a second transport block size (TBS) value corresponding to the number of the second resource blocks in the second MCS level is greater than a first TBS value corresponding to the number of the first resource blocks in the first MCS level. 
 
     
     
       11. The apparatus of  claim 10 , wherein the at least one processor is further configured to determine whether or not to activate a power boosting mode in which the power boosting is performed for scheduling to apply the second MCS level different from the first MCS level corresponding to the channel quality information received by the at least one transceiver. 
     
     
       12. The apparatus of  claim 11 , wherein the at least one processor is further configured to control the at least one transceiver to transmit, to the terminal, additional downlink data based on the first MCS level and the first resource blocks in response to the at least one processor determining not to activate the power boosting mode. 
     
     
       13. The apparatus of  claim 11 , wherein the at least one processor is configured to determine whether or not to activate the power boosting mode based on at least one of:
 whether or not the first MCS level is equal to or less than a threshold MCS level value, or 
 whether or not the number of the first resource blocks is equal to or more than a threshold resource block value. 
 
     
     
       14. The apparatus of  claim 11 , wherein the at least one processor is configured to determine whether or not to activate the power boosting mode based on whether a type of the downlink data to be transmitted is one of an enhanced mobile broadband (eMBB) and an ultra-reliable and low-latency communications (URLLC). 
     
     
       15. The apparatus of  claim 10 , wherein the at least one processor is further configured to:
 identify a candidate for the number of the second resource blocks based on the number of the first resource blocks and a value of the power boosting; and 
 obtain the candidate as the number of the second resource blocks in response to identifying that the second TBS value corresponding to the candidate is greater than the first TBS value, and 
 wherein the candidate provides a largest TBS within a range of resource blocks identified based on the number of the first resource blocks and the value of the power boosting. 
 
     
     
       16. The apparatus of  claim 10 , wherein the at least one processor is further configured to, if it is not possible to obtain the number of the second resource blocks in which the second TBS value is greater than the first TBS value, transmit, to the terminal, downlink data based on the first MCS level and the number of the first resource blocks. 
     
     
       17. The apparatus of  claim 10 , wherein the channel quality information comprises at least one of a channel quality indicator (CQI) which is a measurement result of a first signal transmitted from the base station and hybrid automatic repeat request (HARQ)-acknowledge (ACK) information for a second signal transmitted from the base station. 
     
     
       18. The apparatus of  claim 10 , wherein a value of the power boosting is obtained based on a difference between a channel quality of the received channel quality information and the target channel quality of the second MCS level.